*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
.wrapper{
    width: 100%;
}
.ul_1 li{
    float: left;
}
li{
    list-style: none;
}
a,img{
    display: block;
}
.clearfix:before,
.clearfix:after{
    display: block;
    content: "";
    clear: both;
}
nav,header,.main_1,.main_2,footer{
    width: 100%;
}
nav{
    background: #000;
}
.content{
    width: 1130px;
    margin: 0 auto;
}
.ul_1{
    margin: 0;
}
.ul_1 a:hover{
    background: white;
    color: #333333;
}
.a_1{
    color: #333333;
    background: white;
    line-height: 60px;
    text-align: center;
    padding: 0 20px;
}
.a_2{
    color: white;
    line-height: 60px;
    text-align: center;
    padding: 0 20px;
}
.loge{
    margin: 0 auto;
    padding-bottom: 40px;
}
header{
    background: #2ba3d4;
    padding: 130px 0 135px 0;
}
.p_1{
    color: white;
    font-size: 18px;
    text-align: center;
}
.a_3{
    width: 146px;
    line-height: 50px;
    text-align: center;
    color: #2ba3dc;
    background: white;
    border-radius: 3px;
    margin: auto;
}
h1{
    color: white;
    text-align: center;
    font-size: 50px;
}
.main_1{
    background: #3dc0f1;
    padding: 120px 0;
}
h3{
    color: white;
    font-weight: normal;
    margin-bottom: 20px;
}
.p_2{
    color: white;
    font-size: 15px;
}
.col-md-3{
    margin-top: 60px;
}
.main_2{
    padding: 120px 0;
}
h2{
    color: #222222;
    text-align: center;
    font-size: 36px;
    margin-bottom: 76px;
}
h4{
    color: #3c3c3c;
    text-align: center;
}
.col-md-4 img{
    margin: 30px auto;
}
.card{
    padding: 0 30px;
    border-bottom: 1px solid #0ba1d8;
    border-radius: 0;
}
.p_3{
    color: #616161;
    font-size: 14px;
    margin: 20px 0 60px 0;
}
footer{
    background: #252525;
    padding: 100px 0;
}
footer p{
    text-align: center;
    margin: 0;
    color: #dddddd;
    font-size: 15px;
}
@media (max-width: 600px) {
    nav .content{
        width: 100%;
    }
    nav .content ul li{
        width: 33.333333%;
    }
    header .content,.main_1 .content,.main_2 .content{
        width: 80%;
    }
    header{
        padding: 50px 0;
    }
    .p_1{
        font-size: 50%;
    }
    .p_4{
        width: 100%;
    }
    h2{
        font-size: 20px;
    }
    .col-md-4{
        margin-bottom: 40px;
    }
    .main_1,.main_2{
        padding: 50px 0 20px 0;
    }
}